The following tables display file extensions associated with backup files, with extensions for the most commonly encountered file formats listed first:
| File Extension |
File Description |
| .bak |
Backup File |
| .gho |
Norton Ghost Backup |
| .old |
Backup File |
| .ori |
Original File |
| .tmp |
Temporary File |
| File Extension |
File Description |
| .$$$ |
Temporary File |
| .$db |
dBASE Temporary File |
| .113 |
Iomega Backup File |
| .abk |
Automatic Backup |
| .bac |
Backup File |
| .bck |
VMX Backup File |
| .bcm |
Microsoft Works Communications Script Backup |
| .bdb |
Microsoft Works Database Backup |
| .bkp |
Backup File |
| .bks |
Microsoft Works Spreadsheet Backup |
| .bps |
Microsoft Works Document Backup |
| .bup |
Backup File |
| .cbk |
Backup Configuration File |
| .da0 |
Windows Registry Backup |
| .dbk |
dBASE Database Backup |
| .dov |
Temp File |
| .jbk |
Juno Backup File |
| .nb7 |
NovaBACKUP Output File |
| .nbk |
NovaBACKUP Backup Script |
| .nco |
Nero BackItUp File |
| .nrs |
NovaBACKUP Restore Script |
| .oeb |
Outlook Express Backup Wizard File |
| .qbx |
QuickBooks Accountant Transfer File |
| .qic |
Windows Backup File |
| .win |
Windows Backup File |
| .xlk |
Excel Backup File |
